Armor Break is balanced by the equip it is applied on. If you were to put armor breaking on any of the classes you mentioned it would be very easy to use.
Let’s think about range, the ogmur is a shield range, it is quite low and doesn’t stun, so it requires a little more skill to use over a tiered shield. Swap outs kinda destroy this effect.
Now let’s take Sorc, a scepter hits multiple targets and has a high range. You press spacebar around some enemies and you’re going to hit something. I would say this makes it easier to armor break things, and as such makes it more common.
Besides it’s not very creative anyway, I much prefer non status effect based UT’s as ideas anyway.